The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 1999
Filed:
Jan. 29, 1998
Kenshiro Arase, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A semiconductor nonvolatile memory device where a main bit line is divided into a plurality of sub bit lines via operational connecting means, memory transistors connected to the sub bit lines are arranged in the form of a matrix, and control gate electrodes of these memory transistors are connected to word lines, provided with a means for setting sub bit lines at a programming prohibit potential at the time of a data programming operation; a means for causing a discharge in a selected sub bit line among the sub bit lines set to the programming prohibit potential and placing the non-selected sub bit lines among the sub bit lines in a floating state; and a means for supplying a program voltage to the selected word line.